This document discusses different tool holding devices for milling machines. It describes drill chucks, which are the most common for holding straight-shank cutting tools and contain three jaws that move simultaneously when the outer sleeve is turned. Collets are also discussed, which hold workpieces or cutting tools in a milling machine spindle. Tapping heads are described as self-reversing mechanisms that allow controlled feed for tapping holes. Finally, arbors are defined as cutter holding devices with tapered shanks that fit in the machine spindle and can mount multiple cutters for milling operations.

2.  Chenab College of Engineering
& Technology GRW

3. Subject: Machine Tool & Machining
Present To: Sir. Shakeel Ahmed
Group Members:
Usman Ali 2014-uet-ccet-mech-05
M. Ahmad 2014-uet-ccet-mech-09
H. Zahid Ali 2014-uet-ccet-mech-14
Qamar Abbas 2014-uet-ccet-mech-15

4. Topic?
Tool-Holding Devices For Milling
Machine

5. Tool-Holding Devices
A tool holding device consisting of adjustable jaws that center a
workpiece in a lathe or center a tool in a drill. clamp, clinch. a device
(generally used by carpenters) that holds things firmly together. holder.
a holding device.
Drill Chucks
Collet
Tapping head
Arbor

6. Drill Chucks
Most common devices used for holding straight-shank cutting tools
Most contain three jaws that move simultaneously when outer sleeve
turned
Hold straight shank of cutting tool securely
Two common types
I. Key
II. Keyless

7.  Key-type
Three jaws move simultaneously when outer sleeve
turned
Tighten with key
Different size keys for different size chucks

8.  Keyless
Chuck loosened or tightened by hand without
key
 Precision keyless
Holds smaller drills accurately

9.  Drill Sleeves
Used to adapt drill shank to machine spindle
if taper on tool is smaller than taper in spindle
 Drill Socket
Used when hole in spindle of drill press too small for
taper shank of drill
Used often as extension sockets

10. Collet
 is a subtype of chuck which is device used to
hold a work piece or a cutting tool in the
spindle of a milling machine.

11. Tapping head
 A self reversing tapping mechanism that feeds
into the tapped hole under spring resistance
thus allowing the inward feed to be governed by
the pitch of the thread being tapped. A reversing
mechanism actuates at the bottom of the hole
thus removing the tap like unscrewing a bolt.

14. Arbor
 The Arbor hole of the An arbor is a cutter
holding device with a taper shank to fit the
spindle taper machine: the short or long shaft
end is used to mount and drive one or more
cutters. having holes that fit on to the arbor.
Arbor is used on Horizontal Milling Machine.

16. Thank You!